In case entry from the bootloader isn't "clean"
Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
arch/powerpc/kernel/cpu_setup_power7.S | 18 ++++++++++++++++++
1 files changed, 18 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/kernel/cpu_setup_power7.S
b/arch/powerpc/kernel/cpu_setup_power7.S
index 2390f6f..4f9a93f 100644
--- a/arch/powerpc/kernel/cpu_setup_power7.S
+++ b/arch/powerpc/kernel/cpu_setup_power7.S
@@ -25,7 +25,10 @@ _GLOBAL(__setup_cpu_power7)
bl __init_hvmode_206
mtlr r11
beqlr
+ li r0,0
+ mtspr SPRN_LPID,r0
bl __init_LPCR
+ bl __init_TLB
mtlr r11
blr
@@ -34,7 +37,10 @@ _GLOBAL(__restore_cpu_power7)
mfmsr r3
rldicl. r0,r3,4,63
beqlr
+ li r0,0
+ mtspr SPRN_LPID,r0
bl __init_LPCR
+ bl __init_TLB
mtlr r11
blr
@@ -71,3 +77,15 @@ __init_LPCR:
mtspr SPRN_LPCR,r3
isync
blr
+
+__init_TLB:
+ /* Clear the TLB */
+ li r6,128
+ mtctr r6
+ li r7,0xc00 /* IS field = 0b11 */
+ ptesync
+2: tlbiel r7
+ addi r7,r7,0x1000
+ bdnz 2b
+ ptesync
+1: blr
--
1.7.1
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